Solar
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Solar Photovoltaic Systems
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The sun has always acted as the ultimate source of life, direct or indirect, on the Earth in the form of solar energy. Although this energy has been greatly, although mostly indirectly, utilized by man throughout centuries, he could never control solar energy or store it for future use. It was not until a French physicist discovered that when light in thrown over certain materials, a small amount of electric current is generated. This effect has been named the photovoltaic (PV) effect (“photo” means “light” and “voltaic” means “producing electric current”). This breakthrough meant that the solar energy, which is abundant in most regions of the earth, could now be transformed into another form of energy, electric energy, hence making it possible to store it.
Solar photovoltaic systems make use of solar panels made of silicon to translate sunlight into electricity. Solar photovoltaic systems are employed in numerous ways, first and foremost to power homes that are inter-tied or interconnected with the grid. These days, it is possible to find photovoltaic solar panels for sale. The solar PV collectors can be the beginning of a great new lifestyle.
Solar photovoltaic systems are rough and simple in design and need modest maintenance. Possibly the major benefit of solar photovoltaic devices is that they can be built-up as individual systems to give outputs from microwatts to megawatts. For this reason, they have been utilized as the power basis for calculators, watches, water pumping and space vehicles, and even megawatt-scale power plants. With such a vast variety of applications, the demand for photovoltaic systems is rising every year.
Solar photovoltaic technology was employed for the very first time in running calculators and powering satellites. However, these days this technology is being utilized for generating electricity at a much larger scale. On a large scale, it is vital to change direct current into alternating current; therefore, a device called inverter is normally used. People can also acquire solar panels and photovoltaic shingles to apply to their rooftops.
Normally, solar cells are used to generate electricity. Glass sheets are generally used to protect them from the environment. They are assembled into solar panels. If more power is required (for example, to power a building), the solar panels are connected together electrically, forming solar photovoltaic arrays. These solar panels or photovoltaic arrays can either be positioned on ground or set on buildings, being placed, in either case, in such a way that they face the sun for maximum duration of time. According to data collected in 2005, a single solar photovoltaic array is capable of generating around 3,700 MW worth of electrical power (“peak power”) if employed on nominal basis.
Most of photovoltaic technology is being employed in Germany, Japan and the USA. Other countries, like Australia and Portugal, are also planning to invest heavily in the technology.
Although, due to rise in demand, the silicon prices have sharply increased in the past few years, some countries, like Italy, are offering solar-generated electricity at lower prices than grid electricity. It is expected that if used on large scale, economies of scale could be achieved.
Solar photovoltaic systems mounted on the roof top usually utilize an electric permit and solar heating systems. When mounted on the ground, a building permit is also needed for the support system. Depending upon the height and other features of the solar panels, engineering may also be required. Solar photovoltaic systems, when mounted on the ground, are positioned on a support system. A plan check review is needed at this point which may or may not be completed at the plan check cubicle. Additional documentation and additional plan check and inspection time are needed by support systems for ground mounted solar photovoltaic systems.